From: Adrian Cox <adrian@humboldt.co.uk>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "linuxppc-dev@ozlabs.org" <linuxppc-dev@ozlabs.org>,
Jon Loeliger <jdl@jdl.com>
Subject: Re: SMP in 32-bit arch/powerpc
Date: Thu, 17 Aug 2006 08:19:04 +0100 [thread overview]
Message-ID: <1155799144.28319.7.camel@localhost.localdomain> (raw)
In-Reply-To: <1155769968.11312.110.camel@localhost.localdomain>
On Thu, 2006-08-17 at 01:12 +0200, Benjamin Herrenschmidt wrote:
> For completeness, there is a known bug with 32 bits and SMP regarding
> icache coherency.... If you have random SIGILL/SEGV under load, that's
> probably what you are hitting. The problem is due to the way we do the
> coherency and isn't trivial to fix unfortunately, though it's also
> fairly rare.
Could you give a few more details? I'd not heard of the problem before,
and I couldn't find any references with a few quick searches. I've not
seen the problem myself, but I've not run any heavy page fault loads,
only Altivec load.
--
Adrian Cox <adrian@humboldt.co.uk>
next prev parent reply other threads:[~2006-08-17 7:33 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-02 8:25 SMP in 32-bit arch/powerpc Adrian Cox
2006-08-02 9:08 ` Michael Ellerman
2006-08-02 9:27 ` Zhang Wei-r63237
2006-08-02 13:32 ` Kumar Gala
2006-08-02 19:36 ` Adrian Cox
2006-08-02 14:42 ` Jon Loeliger
2006-08-16 23:12 ` Benjamin Herrenschmidt
2006-08-17 7:19 ` Adrian Cox [this message]
2006-08-17 7:45 ` Benjamin Herrenschmidt
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